Computing weighing scale and basicprice optical indicating means



May 25, 1954 A, VAN DUYN 2,679,190

. COMPUTING WEIGHING SCALE AND BASIC-PRICE OPTICAL INDICATING MEANS Filed March 30, 1951 3 Sheets-Sheet l INVENTom AgRIANUS VAN DUYN ATT'YS May 25, 1954 A. VAN DUYN COMPUTING WEIGHING SCALE AND BASIC-PRICE OPTICAL INDICATING MEANS.

3 Sheets-Sheet 2 Filed March 30, 1951 FIGB A JNVENTOR: ADRIANUS VAN DUYN ATT'YS VAN DUYN COMPUTING WEIGHING SCALE AND BASIC-PRICE May 25, 1954 A.

OPTICAL INDICATING MEANS 3 Sheets-Sheet 3 Filed March 30, 1951 FIGB.

INVENTOR: ADRIANUS VAN DUYN Patented May 25, 1954 UN l-T'ED STAT ES idrTiN-T GFF ICE Adrianus Van Duyn, Hillegersberg,

Rotterdam,

Netherlands, assigner to U. S. Slicing` Machine Company, Inc., La Eorte, Ind., a corporation ci Indiana Application March 30, 1951, Serial No. 218,423

Claims priority, application Great Britain March 20, 1950 6 Claims.

This invention relates to computing weighing scales of the type having adjustable basic-price indicating means and chart means provided with characters which indicate the computed value, i. e the product of the weight and a basic-price andindicating means movable relatively to each. other on application of the load to indicate the weight, a basic-price and the total price of the load (computed value).

Objects of the invention are to facilitate the reading of indications on such a scale, to enable the provision of an increased number of basicprice indications and corresponding computed values. and moreover to facilitate the adjustment of the scale for a predetermined basic-price.

According to 'the invention the computed-value chart is provided with characters arranged in a plurality ci series and each indicating the product of a. basic-price and a number of Weight units, an optical projector adapted to illuminate such a product and to projectra magnified image thereof on a screen, said projector being adjustable over the chart from series to series and moreover manually operable adjustment means adapted to effect. sirnultaneouf..l correlativo adjustment of the basic-price indicatingmeans and said projector. Preferably the screen extends throughout the length of the chart.

In an important embodiment accordingto the invention a manually rotary mainly cylindrical member is provided, on which the basic prices are helically arranged. When such an embodiment is used in combination with a rotary cylindrical coninuted-value chart, a carriage is preferably adjustable in axial direction of both cylinders, said carriage carrying the optical projector-as well as means for the illumination oi an indication on the computed value chart and moreover provided with an indicator to show the basicprice, whereas a connection is provided between the cylinder for the basic-prices and the carriage in such a Way that when the cylinder for the basic-prices is rotated the carriage is adjusted` axially in a position in which a selected basicprice is indicated, while the projector is situated adjacent to the series of characters indicating the product of the weight multiplied by said indicated basiceprice.

In this embodiment it is-very convenient when the chart for the basic-prices can be very rapidly set by means of a manually settable member, a speed accelerating gear being provided between this member and said chart.

Preferably the manually adjustable member comprises a disc providedA with finger holes.

The invention and further details thereof will now be further elucidated by means of the draw'- ing which represents an example of a Weighing scale according to the invention.

Figure l is a front view of the Weighing device;

Figure 2 shows a side view thereof;

Figure 3 is a section according to line III-IIT in Figure 2;

Figure s shows a detail of the setting device on a larger scale;

Figure 5. is a section according to line V-V in Figure 4;

'gure 6 is a section on a larger scale according to line VI-VI in Figure 1;

Figure 7 is a section onV a larger scale according to line lJl-Vll in Figure l.

In Figure l, the housing of the weighing device y is indicated at i and the weighing-scale at 2.

marks indicating prices,

In the housing i a window is provided With an elongated part i of ground glass and a normally transparent part IOn the ground glass fi strips i and 'ic are provided which are not transparent. The strip l or la is provided with clear The reading of the weight taires placeon the glass part 4o by means of an optical reading device 3. At the same time the price reading takes place on the ground glass @l with the aid of a movable optical reading device t. The reading devices 8 and 9 comprise mainly a lamp t5, a lens system it, a magnifying lens and a screen It, lia for the magnied image of a character on a drum The devicel s is movable longitudinally to the drum andV cooperates with a xed elongated mirror 3S.

On one of the side Walls of the weighing device a setting disc lli has been arranged which cooperates by means of toothed wheels H and.

l2 vwith a knob i3 for ne setting (see Figure 3.). This knob t3 is connected with ar shaft i4, provided with a helical groove i5 and also With a helically arranged series It of basic-prices. Two

indicating members il and l El are attached tothe reading device Si as Well as a lug i9 which engages the groove l5 in the shaft it. Rails 32 and 33 serve as a guide for the reading device 9. On the cylindrical chart 34 various computed values (products of basic prices and units) are arranged in very line series. The setting disc l@ has. a 'flanged edge 2Q and. may also carry on its periphery a price-scale 2|. Further an indicating member 22 may be provided on the flange 2.3y of a stationary disc 24. The disc il), which isconnected with a toothed wheel li by means. or a.

screwor rivet connection 25 is provide/1` with holes 2t in which a linger can be inserted for rotating the disc. To protect the nger tips from passing through openings 2t and becoming harmed by the sharp edges of the teeth on toothed wheel il a protective ring 2l is mounted on the toothed wheel i l by means oi pins or bolts 28 arranged at some distance from each other. The whole can revolve about a shaft which is secured to the housing i. A stop 3c on the protective ring fil cooperates with a cam 3l on the disc 2li and serves to limit the movement of the reading device (Figures l and 5). This movement is effected by the cooperation of the lug i9 with the groove l5 in the shaft The screen may have a curved cross section which is adapted to the curvature of the cylinder 3d in such a way that the projector on this screen l gives the sharpest possible image oi' the characters, at least in the neighborhood of the reading line 4c. out the screen li.

The operation is as follows:

Prior to placing the load to be weighed on the scale the basic-price is adjusted. As the indicating means Il and it ci the reading device 9 will be arbitrarily positioned the price next to the desired basic price is first looked up on the strip a or la and in this way it is determined at about what place the device 9 must be set. rlhen the disc lo is rotated by a nger and set at about the price desired by bringing the corresponding price mark opposite the indicating member rIhis is the rapid, coarse setting operation. By now rotating the preferably peripherally lrnurled lrnob i3 with the thumb a very accurate adjustment can also be obtained quickly. This is the ne setting operation. As in general the periphery of the helical price scale it will be larger than the periphery ci the disc It, the scale it is more accurate and can easily be read with the aid ci the members l1 and I8.

Ii the load to be weighed is then placed on the scale 2 the weight is read at fla and the total price (computed value) is to be viewed just over the set basic-price.

Figure 1 shows an example thereoi.

The shape ci the computed-value chart 34 may also diiier from the cylindrical shape. For instance, may be flat.

This application is a continuation-in-part of my copending application, Serial No. l85,973, iiled September 21, 1950, issued May 19, 1953, as Patent 2,638,813.

Changes may be made in the form, construction and arrangement ci parts from those disclosed herein without in any way departing from the spirit of the invention or sacrificing any of the attendant advantages thereof, provided, however, that such changes fall within the scope of the claims appended hereto.

rThe invention is hereby claimed as follows:

1. A computing weighing scale comprising a computed value chart on which the characters are arranged in a plurality of series each corresponding to a basic price, movable basic price indicating means, moving means for moving said basic price indicating means to display individual basic price characters, viewing means for said computed values adjustable over said computed value chart from series to series, adjustment means operable in response to movement of said basic price indicating means to effect simulta-I neous correlativo adjustment of said viewing means with respect to said computed value chart, and manually settable members comprising a pair This reading line extends throughci discs, means connecting said discs with said moving means for said basic price indicating means, one of said discs being larger than the other for rough and nne adjustment, respectively, or basic-price indicating means, said larger disc being provided with finger holes, and the periphery oi the smaller disc being situated adj cent to said larger disc such a way that the iingers may engage the ringer holes oi the larger disc and the thumb the periphery of the smaller disc.

2. A computing weighing scale comprising a computed vaiue chart on which the characters are arranged in a plurality of series each corresponding to a basic price, movable basic price indicating means, moving means i'or moving said basic price indicating means to display individual basic price characters, viewing means for said computed values adjustable over said computed value chart from series to series, adjustment means operable in response to movement of said basic price indicating means to effect simultaneous correlative adjustment oi said viewing means with respect to said computed value chart, manually settable members comprising a pair of discs, means connecting said discs with said moving means for said basic price indicating means, one of said discs being larger than the other for rough and fine adjustment, respectively, of said basic price indicating means, said larger disc being provided with finger holes, and the periphery of the smaller disc being situated adjacent to said larger disc in such a way that the fingers may engage the nger holes of the larger disc and the thumb the periphery of the smaller disc, and speed accelerating means connected between larger disc and said moving means.

3. in a setting device :for a scale comprising a computed value chart, a basic price indicating means, and a viewing means for the characters on the computed value chart movable in response to a setting ci the basic price indicating means, the combination oi manual setting means comprising a pair ci discs, means connecting said discs with said basic price indicating means to move said viewing means to a predetermined position in iront oi characters on the computed value chart corresponding to a predetermined basic price, one of said discs being larger than the other for rough and ne adjustment, respectively, of said basic price indicating means, said larger disc being provided with finger holes, the periphery of the smaller disc being situated adjacent to said larger disc in such a way that the fingers may engage the finger holes of the large' disc and the thumb the periphery of the smaller disc, and speed accelerating means connected between said larger disc and the means to move viewing means.

li. A computing weighing scale comprising a rotary cylindrical computed-value chart on which the characters are arranged in a plurality of series each corresponding to a basic price, a manually rotatable substantially cylindrical basic-price chart with the characters arranged helically thereon and with its anis parallel to the axis of the computed-value chart, a carriage support means to support said carriage, said carriage being mounted on the support means and movable axially of the charts, an optical projector reading device mounted on the carriage including a light source and light condensing means adapted to illuminate the computed-value indication on said cylindrical chart and a lens supported on said carriage and adapted to project a magniiied image of said indication, an elongated glass screen carried by said housing adapted to receive the projected magnied image, an operative connection between the basic-price chart and the carriage, whereby rotation of the basicprice chart effects axial adjustment of the carriage to a position in which a selected basic price is indicated and the projector is adjacent the.

series of computed values corresponding to the indicator basic price, means for manually rotating said basic-price chart including a large disc having finger holes therein for rough adustment and a smalier disc adjacent thereto for ne adjustment, and means connecting said discs with said basic-price chart.

5. A computing Weighing scale comprising a rotary cylindrical computed-value chart on which the characters are arranged in a plurality of series each corresponding to a basic price, acljustable viewing means for said computed value chart, a rotatable substantially cylindrical basicprice chart with the basic price characters arranged helically thereon and with its axis substantially parallel to the axis of the computedvalue chart, means for rotating said basic price chart including a pair of discs both connected thereto, one of said discs having finger holes therein and adapted for rough adjustment and the other disc adapted for fine adjustment, and adjustment means operable in response to the rotation of said basic-price chart to effect simultaneous correlative adjustment of the viewing means with respect to said computed value chart.

6. A computing Weighing scale comprising a ro tary cylindrical computed-value chart on which the characters are arranged in a plurality of y ment of said viewing means with respect to said computed-value chart, said adjustment means comprising a carriage for said viewing means and a lug on said carriage cooperating with said groove, means for rotating said basic-price chart including a pair of discs, one of said discs having a plurality of finger holes therein and utilized for rough adjustment and the other disc being utilized for iine adjustment, and means connecting said discs to said basic-price chart.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,407,987 Crane Feb. 28, 1922 1,487,514 Goss Mar. 18, 1924 1,619,121 Hem Mar. 1, 1927 1,715,074 Platten May 218, 1929 2,061,894 Carlson Nov. 24, 1936 2,189,825 Waugh Feb. 13, 1940 2,370,982 Marshall Mar. 6, 1945 2,541,365 Kauman Feb. 13, 1951 

